MYXOCOCCACEAE PEROXIDASE

Abstract: The present invention relates to a novel peroxidase preparation characterized by being producible by cultivation of a peroxidase producing strain of the family <u>Myxococcaceae</u>.

Description: MYXOCOCCACEAE PEROXIDASE FIELD OF INVENTION The present invention relates to a novel peroxidase, a process for its production and to its use in bleaching and detergent compositions. BACKGROUND OF THE INVENTION Peroxidases (E.C. 1.11.1.7) are enzymes that catalyze the oxidation of a substrate (an electron or hydrogen donor) with hydrogen peroxide. Such enzymes are known from microbial, plant and animal origins, e.g. peroxidase from Coprinus cinereus (cf. e.g. EP 179,486) . They are typically hemo- proteins, i.e. they contain a heme as a prosthetic group. It has been found that peroxidases, utilizing hydrogen peroxide as substrate, are able to enhance the bleach- ing effect of hydrogen peroxide during washing. The use of peroxidases for bleaching stains on fabrics is described in WO 89/09813. It has also been found that coloured substances leached from dyed fabrics could be bleached by means of peroxidases together with hydrogen peroxide. The use of peroxidases for inhibiting dye transfer in this way is de¬ scribed in WO 91/05839. Certain oxidizable substrates, e.g. metal ions and phenolic compounds such as 7-hydroxycoumarin (7HCm) , vanillin (VAN) , and p-hydroxybenzenesulfonate (pHBS) , have been de- scribed as accelerators or enhancers, able to enhance bleaching reactions (cf. e.g. WO 92/18683, WO 92/18687, and Kato M and Shimizu S. Plant Cell Physiol. 1985 26 (7), pp. 1291-1301 (cf. Table 1 in particular) . In WO 94/12621 other types of enhancing agents are disclosed, e.g. phenothiazines and phenoxazines. It is the object of this invention to provide a peroxidase with improved bleaching performance at high pH. SUMMARY OF THE INVENTION We have unexpectedly found that a novel peroxidase can be obtained from Myxococcaceae, a family not previously reported to produce peroxidase, and we have further found that, 5 surprisingly, this novel peroxidase shows excellent performance in bleaching assays at pH 10.5. Accordingly, the invention provides a peroxidase preparation, characterized by being producible by cultivation of a peroxidase producing strain of the family Myxococcaceae. 10 The invention further provides a process for the production of peroxidase, characterized by comprising cul¬ tivation in a suitable nutrient medium of a peroxidase-produc¬ ing strain of Myxococcaceae. Finally, the invention provides use of said peroxidase in bleaching and detergent compositions. 15 BRIEF DESCRIPTION OF DRAWINGS The present invention is further illustrated by reference to the accompanying drawings, in which: Fig. 1 shows the initial bleaching of Direct Blue 1 (DB1) under the following conditions: 100 μM H 2 0 2 ; 20 mM 20 acetate/phosphate-buffer; 0.12 PODU/ml Myxococcus virescens peroxidase; pH 5 (□) - pH 6 (♦) - pH 7 (I) - pH 8 (O) - pH 9 (X) , respectively; room temperature. Fig. 2 shows the initial bleaching of DB1 using the conditions just described, but additionally containing 10 μM 2510-propionic acid phenothiazine. Fig. 3 shows the initial bleaching of DB1 at pH 10.5 under the following conditions: 100 μM H 2 0 2 ; 25 mM Borate; 0.5 PODU/ml Myxococcus virescens peroxidase; 0 μM 10-propionic acid phenothiazine (D) / 10 μM 10-propionic acid phenothiazine (♦) , 30 respectively; room temperature. DETAILED DISCLOSURE OF THE INVENTION Microorganism According to the invention, peroxidase is derived from a peroxidase-producing strain of the Myxococcaceae. In the family Myxococcaceae the genera Myxococcus and Corallococcus are preferred, in particular Myxococcus virescens, Myxococcus fulvus, Myxococcus xanthus, Corallococcus coralloides and Corallococcus exiguus. The family Myxococcaceae is described in Myxobacteria II (M. Dworkin and D. Kaiser, Eds.) , American Society for Microbiology 1993. A strain representative of Myxococcus virescens has been deposited according to the Budapest Treaty on the Inter¬ national Recognition of the Deposits of Microorganisms for the Purpose of Patent Procedures, on 4 October 1993, at Deutsche Sammlung von Microorganismen und Zellkulturen GmbH, under Accession No. DSM 8593. A strain representative of Myxococcus fulvus has been deposited according to the Budapest Treaty on the International Recognition of the Deposits of Microorganisms for the Purpose of Patent Procedures, on 9 February 1994, at Deutsche Sammlung von Microorganismen und Zellkulturen GmbH, under Accession No. DSM 8969. A strain representative of Myxococcus xanthus has been deposited according to the Budapest Treaty on the Inter¬ national Recognition of the Deposits of Microorganisms for the Purpose of Patent Procedures, on 9 February 1994, at Deutsche Sammlung von Microorganismen und Zellkulturen GmbH, under Accession No. DSM 8970. A strain representative of Corallococcus coralloides has been deposited according to the Budapest Treaty on the International Recognition of the Deposits of Microorganisms for the Purpose of Patent Procedures, on 9 February 1994, at Deutsche Sammlung von Microorganismen und Zellkulturen GmbH, under Accession No. DSM 8967. A strain representative of Corallococcus exiguus has been deposited according to the Budapest Treaty on the Inter¬ national Recognition of the Deposits of Microorganisms for the Purpose of Patent Procedures, on 9 February 1994, at Deutsche Sammlung von Microorganismen und Zellkulturen GmbH, under Accession No. DSM 8968. Production of Peroxidase Peroxidase of the invention may be produced by aerobic cultivation of the above mentioned microbial strain on a nutrient medium containing suitable carbon and nitrogen sources, such media being known in the art. A temperature in the range of from 20 to 30°C is suitable for growth and peroxidase production. Alternatively, peroxidase of the invention can be produced by aerobic cultivation of a transformed host organism containing the appropriate genetic information from the above mentioned strain. Such transformants can be prepared and cultivated by methods known in the art. The peroxidase can be recovered by removing the cells from the fermentation medium (e.g. by centrifugation or filtration) and then concentrating the broth (e.g. by ultra- filtration) . If desired, the peroxidase can be further purified by known methods. Immunochemical Properties Peroxidase preparations having immunochemical properties identical or partially identical to those of a peroxidase produced by a peroxidase producing strain of Myxococcus virescens, DSM 8593, or a peroxidase producing strain of Myxococcus fulvus, DSM 8969, or a peroxidase produc¬ ing strain of Myxococcus xanthus, DSM 8970, or a peroxidase producing strain of Corallococcus coralloides, DSM 8967, or a peroxidase producing strain of Corallococcus exiguus, DSM 8968, are within the scope of the invention. The immunochemical properties can be determined immunologically by cross-reaction identity tests. The identity tests can be performed by the well-known Ouchterlony double immunodiffusion procedure or by tandem crossed immunoelectrophoresis according to I. M. Roitt; Immunology, Gower Medical Publishing (1985) and N. H. Axelsen; Handbook of Immunoprecipitation-in-Gel Techniques, Blackwell Scientific Publications (1983) , Chapters 5 and 14. The terms "antigenic identity" and "partial antigenic identity" are described in the same book, Chapters 5, 19 and 20. Thermostability The thermostability of the peroxidase of the inven¬ tion was investigated in the temperature interval of from room temperature to 90°C. The Myxococcus virescens, DSM 8593, peroxidase was stable up to 60°C for 2 hours without loss of activity. However, at 90°C all activity was lost after 15 min. Bleaching To obtain a bleaching effect of the Myxococcaceae peroxidase, hydrogen peroxide or a precursor of hydrogen peroxide, preferably perborate or percarbonate, or a hydrogen peroxide generating enzyme system, e.g. an oxidase and its substrate, or a peroxycarboxylic acid or a salt thereof, should be present in the bleaching composition of the invention as substrate for the peroxidase. While the mechanism of peroxidase bleaching of coloured substances present on fabrics or in the wash liquor has not yet been elucidated, it is currently believed that the enzyme acts by reducing hydrogen peroxide and oxidizing the coloured substance (electron donor substrate) , thereby either generating a colourless substance or providing a substance which is not adsorbed to the fabric. This reaction is shown in Reaction Scheme 1 below Reaction Scheme 1 : Peroxidase Donor substrate + H 2 0 2 -> oxidized donor + H 2 0 According to the invention, the peroxidase may typically be a component of a bleaching composition. In the bleaching composition, the amount of peroxidase corresponds to a concentration in the wash liquor of between 0.01 and 20 PODU/ml, and the amount of hydrogen peroxide or hydrogen peroxide precursor or hydrogen peroxide generating enzyme system or percarboxylic acid or a salt thereof corresponds to a hydrogen peroxide concentration of up to 20 mM H 2 0 2 , prefer¬ ably a hydrogen peroxide concentration of up to 1 mM H 2 0 2 . Determination of peroxidase activity: 1 peroxidase unit (PODU) is the amount of enzyme that catalyzes the conver¬ sion of 1 μmol hydrogen peroxide per minute at the following analytical conditions: 0.88 mM hydrogen peroxide, 1.67 mM 2,2'- azinobis (3-ethylbenzothiazoline-6-sulfonate) , 0.1 M phosphate buffer, pH 7.0, incubated at 30°C, photometrically followed at 418 nm. For use of the present peroxidase for bleaching purposes, it has been found that the addition of another oxidizable substrate (for the peroxidase of the invention) at the beginning or during the washing and/or rinsing process may enhance the bleaching effect of the peroxidase employed. This is thought to be ascribable to the formation of radicals or other oxidized states of this substrate which participate in the bleaching or other modification of the coloured substance. Examples of such oxidizable substrates are organic compounds such as phenolic compounds, e.g. p-hydroxybenzenesulfonate and 10-propionic acid phenothiazine and other phenothiazines and phenoxazines and derivatives thereof as described in WO 94/12621. The amount of oxidizable substrate corresponds to a concentration in the wash liquor of between 0.1 μM and 100 μM. Detergent Compositions In all the following detergent compositions hydrogen peroxide or a precursor of hydrogen peroxide, preferably perborate or percarbonate, or a hydrogen peroxide generating enzyme system, e.g. an oxidase and its substrate, or a peroxy- carboxylic acid or a salt thereof, should be present as substrate for the peroxidase. According to the invention, the peroxidase may typically be a component of a detergent composition. As such, it may be included in the detergent composition in the form of a non-dusting granulate, a stabilized liquid, or a protected 5 enzyme. Non-dusting granulates may be produced, e.g., as disclosed in US 4,106,991 and 4,661,452 (both to Novo Industri A/S) and may optionally be coated by methods known in the art. Examples of waxy coating materials are poly(ethylene oxide) products (polyethyleneglycol, PEG) with mean molar weights of 101000 to 20000; ethoxylated nonylphenols having from 16 to 50 ethylene oxide units; ethoxylated fatty alcohols in which the alcohol contains from 12 to 20 carbon atoms and in which there are 15 to 80 ethylene oxide units; fatty alcohols; fatty acids; and mono- and di- and triglycerides of fatty acids. Examples 15 of film-forming coating materials suitable for application by fluid bed techniques are given in patent GB 1483591. Liquid enzyme preparations may, for instance, be stabilized by adding a polyol such as propylene glycol, a sugar or sugar alcohol, lactic acid or boric acid according to established methods. 20 Other enzyme stabilizers are well known in the art. Protected enzymes may be prepared according to the method disclosed in EP 238,216. The detergent composition of the invention may be in any convenient form, e.g. as powder, granules, paste or liquid. 25 A liquid detergent may be aqueous, typically containing up to 70% of water and 0-30% of organic solvent, or nonaqueous. The detergent composition comprises one or more surfactants, each of which may be anionic, nonionic, cationic, or zwitterionic. The detergent will usually contain 0-50% of 30 anionic surfactant such as linear alkylbenzenesulfonate (LAS) , alpha-olefinsulfonate (AOS) , alkyl sulfate (fatty alcohol sulfate) (AS) , alcohol ethoxysulfate (AEOS or AES) , secondary alkanesulfonates (SAS) , alpha-sulfo fatty acid methyl esters, alkyl- or alkenylsuccinic acid or soap. It may also contain 0- 3540% of nonionic surfactant such as alcohol ethoxylate (AEO or AE) , carboxylated alcohol ethoxylates, nonylphenol ethoxylate, alkylpolyglycoside, alkyldimethylamineoxide, ethoxylated fatty acid monoethanolamide, fatty acid monoethanola ide, or polyhydroxy alkyl fatty acid amide (e.g. as described in WO 92/06154) . The detergent composition may additionally comprise one or more other enzymes, such as amylase, lipase, cutinase, protease, cellulase, and/or another oxidoreductase. The detergent may contain 1-65% of a detergent builder or complexing agent such as zeolite, diphosphate, triphosphate, phosphonate, citrate, nitrilotriacetic acid (NTA) , ethylenediaminetetraacetic acid (EDTA) , diethylenetri- aminepentaacetic acid (DTMPA) , alkyl- or alkenylsuccinic acid, soluble silicates or layered silicates (e.g. SKS-6 from Hoechst) . The detergent may also be unbuilt, i.e. essentially free of detergent builder. The detergent may comprise one or more polymers. Examples are carboxymethylcellulose (CMC) , poly(vinyl- pyrrolidone) (PVP) , polyethyleneglycol (PEG) , poly(vinyl alcohol) (PVA) , polycarboxylates such as polyacrylates, maleic/acrylic acid copolymers and lauryl methacrylate/acrylic acid copolymers. The detergent may contain a bleaching system which may comprise a H 2 0 2 source such as perborate or percarbonate which may be combined with a peracid-forming bleach activator such as tetraacetylethylenediamine (TAED) or nonanoyloxyben- zenesulfonate (NOBS) . Alternatively, the bleaching system may comprise peroxyacids of e.g. the amide, imide, or sulfone type. The enzymes of the detergent composition of the invention may be stabilized using conventional stabilizing agents, e.g. a polyol such as propylene glycol or glycerol, a sugar or sugar alcohol, lactic acid, boric acid, or a boric acid derivative as e.g. an aromatic borate ester, and the com¬ position may be formulated as described in e.g. WO 92/19709 and WO 92/19708. The detergent may also contain other conventional detergent ingredients such as e.g. fabric conditioners in¬ cluding clays, foam boosters, suds suppressors, anti-corrosion agents, soil-suspending agents, anti-soil redeposition agents, dyes, bactericides, optical brighteners, or perfume. The pH (measured in aqueous solution at use con¬ centration) will usually be neutral or alkaline, e.g. 7-11. Particular forms of detergent compositions within the 5 scope of the invention include: 1) A detergent composition formulated as a granulate having a bulk density of at least 600 g/1 comprising - linear alkylbenzenesulfonate (calculated as acid) 7 - 12% 10 - alcohol ethoxysulfate - alcohol ethoxylate (e . g . C u.15 alcohol , 7 EO) 15 - sodium carbonate (as Na 2 C0 3 ) - soluble silicate (as Na 2 0 , 2Si0 2 ) - zeolite (as NaAlSi0 4 ) - sodium sulfate (as Na 2 S0 4 ) - sodium citrate/citric acid 20 (as C 6 H 5 Na 3 0 7 /C 6 H 8 0 7 ) - sodium perborate (as NaB0 3 . H 2 0) - TAED - carboxymethylcellulose - polymers (e.g. maleic/acrylic acid 25 copolymer, PVP, PEG) - enzymes - minor ingredients (e.g. suds suppressors, perfume, optical brightener, photobleach) 302) A detergent composition formulated as a granulate having a bulk density of at least 600 g/1 comprising - linear alkylbenzenesulfonate (calculated as acid) 6 - 11% - alcohol ethoxysulfate 35 (e . g . C l2 . 18 alcohol , 1 -2 EO) or alkyl sulfate (e . g . C 16 . 18 ) 1 - 3% - alcohol ethoxylate (e . g . C 1 . 15 alcohol , 7 EO) - sodium carbonate (as Na 2 C0 3 ) - soluble silicate (as Na 2 0, 2Si0 2 ) 5 - zeolite (as NaAlSi0 4 ) - sodium sulfate (as Na 2 S0 4 ) - sodium citrate/citric acid (as C 6 H 5 Na 3 0 7 /C 6 H 8 0 7 ) - carboxymethylcellulose 10 - polymers (e.g. maleic/acrylic acid copolymer PVP, PEG) - enzymes - minor ingredients (e.g. suds suppressors, perfume) 0 - 5% 153) A detergent composition formulated as a granulate having a bulk density of at least 600 g/1 comprising - linear alkylbenzenesulfonate (calculated as acid) 5 - 9% - alcohol ethoxylate 0 (e . g . C 12 . 15 alcohol , 7 EO) 7 - 14% - soap as fatty acid (e . g . C 16.22 ) - sodium carbonate (as Na 2 C0 3 ) - soluble silicate (as Na 2 0, 2Si0 2 ) 5 - zeolite ( as NaAlSi0 4 ) - sodium sulfate (as Na 2 S0 4 ) - sodium perborate (as NaB0 3 . H 2 0) - TAED - phosphonate (e.g. EDTMPA) 0 - carboxymethylcellulose - polymers (e.g. maleic/acrylic acid copolymer, PVP, PEG) 0 - enzymes minor ingredients (e.g. suds suppressors, perfume, optical brightener) 0 - 5% 4) A detergent composition formulated as a granulate having 5 a bulk density of at least 600 g/1 comprising - linear alkylbenzenesulfonate (calculated as acid) 8 - 12% - alcohol ethoxylate (e . g . C 12 . 15 alcohol , 7 EO) 10 - sodium carbonate (as Na 2 C0 3 ) - soluble silicate (as Na 2 0, 2Si0 2 ) - zeolite (as NaAlSi0 4 ) - sodium sulfate (as Na 2 S0 4 ) - carboxymethylcellulose 15 - polymers (e.g. maleic/acrylic acid copolymer PVP, PEG) - enzymes - minor ingredients (e.g. suds suppressors, perfume) 0 - 5% 205) An aqueous liquid detergent composition comprising - linear alkylbenzenesulfonate (calculated as acid) 15 - 21° alcohol ethoxylate (e.g. C, 2 , 5 alcohol, 7 EO or 25 '12-15 al .CcOo £hol, 5 EO) 12 - 18! - soap as fatty acid (e.g. oleic acid) 3 - 13% - alkenylsuccinic acid (C 12 . 14 ) 0 - 13% - aminoethanol 8 - 18% - citric acid 2 - 8% 30 - phosphonate 0 - 3% - polymers (e.g. PVP, PEG) 0 - 3% - borate (as B 4 0 7 ) 0 - 2% - ethanol 0 - 3% - propylene glycol 8 - 14% - enzymes 0 - 5% - minor ingredients (e.g. dispersants, suds suppressors, perfume, optical brightener) 0 - 5% 6) An aqueous structured liquid detergent composition compris¬ ing - linear alkylbenzenesulfonate (calculated as acid) 15 - 21% - alcohol ethoxylate (e.g. C 12 .^ alcohol, 7 EO or C 12 . 15 alcohol, 5 EO) - soap as fatty acid (e.g. oleic acid) - zeolite (as NaAlSi0 4 ) - potassium citrate - borate (as B 4 0 7 ) - carboxymethylcellulose - polymers (e.g PEG, PVP) - anchoring polymers as e.g. lauryl methacrylate/acrylic acid copolymer; molar ratio 25:1; MW 3800 0 - 3% - glycerol 0 - 5% - enzymes 0 - 5% - minor ingredients (e.g. dispersants, suds suppressors, perfume, optical brighteners) 0 - 5% 7) A detergent composition formulated as a granulate having a bulk density of at least 600 g/1 comprising - fatty alcohol sulfate 5 - 10% - ethoxylated fatty acid monoethanolamide 3 - 9% - soap as fatty acid 0 - 3% - sodium carbonate (as Na 2 C0 3 ) - soluble silicate (as Na 2 0, 2Si0 2 ) - zeolite (as NaAlSi0 4 ) - sodium sulfate (as Na 2 S0 4 ) - sodium perborate (as NaB0 3 . H 2 0) - TAED - polymers (e.g. maleic/acrylic acid copolymer PEG) - enzymes - minor ingredients (e.g. optical brightener, suds suppressors, perfume) 0 5% 8) A detergent composition formulated as a granulate comprising - linear alkylbenzenesulfonate (calculated as acid) - ethoxylated fatty acid monoethanolamide - soap as fatty acid - sodium carbonate (as Na 2 C0 3 ) - soluble silicate (as Na 2 0,2Si0 2 ) - zeolite (as NaAlSi0 4 ) - sodium sulfate (as Na 2 S0 4 ) - sodium citrate (as C 6 H 5 Na 3 0 7 ) - polymers (e.g. PVP, maleic/acrylic acid copolymer, PEG) - enzymes - minor ingredients (e.g. suds suppressors, perfume) 5% 9) A detergent composition formulated as a granulate comprising - linear alkylbenzenesulfonate (calculated as acid) 6 - 12% - nonionic surfactant, 1 - 4% - soap as fatty acid 2 - 6% - sodium carbonate (as Na 2 C0 3 ) 14 - 22% - zeolite (as NaAlSi0 4 ) 18 - 32% - sodium sulfate (as Na 2 S0 4 ) 5 - 20% - sodium citrate (as C 6 H 5 Na 3 0 7 ) 3 - 8% - sodium perborate (as NaB0 3 .H 2 0) 4 - 9% - bleach activator (e.g. NOBS or TAED) 1 - 5% - carboxymethylcellulose 0 - 2% - polymers (e.g. polycarboxylate or PEG) 1 - 5% - enzymes 0 - 5% - minor ingredients (e.g. optical brightener, perfume) 0 - 5% 10) An aqueous liquid detergent composition comprising - linear alkylbenzenesulfonate (calculated as acid) 15 - 23% - alcohol ethoxysulfate (e.g. C 12.15 alcohol, 2-3 EO) 8 - 15% - alcohol ethoxylate (e.g. C 12. „ alcohol, 7 EO or C 12 . 15 alcohol , 5 EO) 3 - 9% - soap as fatty acid (e . g . lauric acid) 0 - 3 % - aminoethanol 1 - 5% - sodium citrate 5 - 10% - hydrotrope (e.g. sodium toluenesulfonate) 2 - 6% - borate (as B 4 0 7 ) 0 - 2% - carboxymethylcellulose 0 - 1% - ethanol 1 - 3% - propylene glycol 2 - 5% - enzymes 0 - 5% - minor ingredients (e.g. polymers, dispersants, perfume, optical brighteners) 0 - 5% 11) An aqueous liquid detergent composition comprising - linear alkylbenzenesulfonate (calculated as acid) 20 - 32% - alcohol ethoxylate (e.g. C 12 .^ alcohol, 7 EO or C, , c alcohol, 5 EO) 6 - 12% - aminoethanol 2 - 6% - citric acid 8 - 14% - borate (as B 4 0 7 ) 1 - 3% - polymer (e.g. maleic/acrylic acid copolymer, anchoring polymers as e.g. lauryl methacrylate/acrylic acid copolymer and CMC) - glycerol - enzymes - minor ingredients (e.g. hydrotropes, dispersants, perfume, optical brighteners) 0 - 5% 12) A detergent composition formulated as a granulate having a bulk density of at least 600 g/1 comprising - anionic surfactant (linear alkylbenzenesulfonate, alkyl sulfate, alpha- olefinsulfonate, alpha-sulfo fatty acid methyl esters, alkanesulfonates, soap) 25 - 40% - nonionic surfactant (e . g . alcohol ethoxylate) 1 - 10% - sodium carbonate (as Na 2 C0 3 ) 8 - 25% - soluble silicates (as Na 2 0, 2Si0 2 ) 5 - 15% - sodium sulfate (as Na 2 S0 4 ) 0 - 5% - zeolite (as NaAlSi0 4 ) 15 - 28% - sodium perborate (as NaB0 3 . 4H 2 0) 0 - 20% - bleach activator (TAED or NOBS) 0 - 5% - enzymes 0 - 5% - minor ingredients (e.g. perfume, optical brighteners) 0 - 3% 13) Detergent formulations as described in 1) - 12) where the content of linear alkylbenzenesulfonate - or a part of it - is substituted by alkyl sulfate (C 12 -C 18 ) . 14) Detergent formulations as described in 1) - 13) which 5 contain a stabilized or encapsulated peracid either as an additional component or as a substitute for already specified bleach systems. 15) Detergent compositions as described in 1) , 3) , 7) , 9) and 12) wherein perborate is substituted for percarbonate. ιo 16) Detergent compositions as described in 1) , 3) , 7) , 9) and 12) which additionally contains a Manganese catalyst. The Manganese catalyst may e.g. be one of the compounds described in "Efficient manganese catalysts for low-temperature bleach¬ ing", Nature 369, 1994, pp. 637-639. 15 17) Detergent composition formulated as a nonaqueous detergent liquid comprising a liquid nonionic surfactant as e.g. linear alkoxylated primary alcohol, a builder system (e.g. phosphate) , enzyme and alkali. The detergent may also comprise anionic surfactant and/or a bleach system. 20 It is at present contemplated that, in the detergent composition of the invention, the peroxidase may be added in an amount corresponding to a concentration in the wash liquor of between 0.01 to 20 PODU/ml. The present invention is further illustrated in the 5 following examples which are not in any way intended to limit the scope of the invention as claimed. EXAMPLE 1 The peroxidase preparations of the invention may be produced by the method described in this example. 0 The peroxidase producing strain, e.g. Myxococcus virescens, DSM 8593, is inoculated on "CY" agar plates con- taining the following composition: Casitone 3 g Yeast extract 1 g CaC1.2H 2 0 1 g Agar 15 g Water ad 1000 ml, pH 7.2 Incubation for 2 weeks at 26°C. The agar is cut into pieces and transferred aseptic- ally to shake flasks, each containing 100 ml medium with the following composition: Casitone 6 g CaCl.2H 2 0 0.5 g MgS0 4 .7H 2 0 2 g Vitamin-solution 1 ml, all four ingredients mixed in 1000 ml 25 mM HEPES (Sigma H 3375) buffer solution, pH 7. The flasks are incubated on a rotary shaker at 250 rpm, 26°C, for 6 days. Using the above described method a culture of Myxococcus virescens, DSM 8593, gave a fermentation result of 0.2 PODU/ml. After separation of the solid material by centrifuga- tion the peroxidase may be concentrated by ultrafiltration using a 10 kDa cut off membrane. The ultrafiltrated preparation of Myxococcus virescens, DSM 8593, had an activity of 2.9 PODU/ml . EXAMPLE 2 The ultrafiltrated preparation described in Ex. 1 was used in a number of dye bleaching experiments, using the initial bleaching of Direct Blue 1 (DBl) . Fig. 1 shows the bleaching of DB 1 under the following conditions: 100 μM H 2 0 2 20 mM acetate/phosphate-buffer 0.12 PODU/ml (Myxococcus virescens peroxidase) pH 5 (D) - pH 6 (♦) - pH 7 (I) - pH 8 (O) - pH 9 (X) , respectively; room temperature the initial concentration of DBl is adjusted to yield an OD 610 = 0.6. Reagents were mixed in a 1 cm cuvette, and the bleaching was started by addition of hydrogen peroxide. The bleaching was detected spectrophotometrically at 610 nm, which is the absorption peak of this dye. The same experiments were repeated using the con¬ ditions described above, but additionally containing an accelerator: 10 μM 10-propionic acid phenothiazine. The results are shown in Fig. 2. The initial bleaching of Direct Blue 1 was also conducted at pH 10.5 (Fig. 3) with the following conditions: 100 μM H 2 0 2 25 mM Borate 0.5 PODU/ml (Myxococcus virescens peroxidase) 0 μM 10-propionic acid phenothiazine (D) , 10 μM 10- propionic acid phenothiazine (♦) , respectively room temperature the initial concentration of DBl is adjusted to yield an OD 61Q = 0.6. Fig. 3 shows that the effect of the accelerator is very pronounced at high pH. It also shows that the absorbance is reduced to at least half the initial value after 30 sec. in the experiment with 10 μM 10-propionic acid phenothiazine. EXAMPLE 3 Purification of Myxococcus virescens The ultrafiltrated preparation of M. virescens, DSM 8593, described in Example 1, was dialyzed against 20 mM NaAc pH 5.0 (hereafter called buffer A) and applied to a S-Sepharose Fast Flow column equilibrated with buffer A. The column was washed using three column volumes of buffer A and then eluted with a linear gradient from buffer A to Buffer A + 0.15 M NaCl over 30 column volumes. Active fractions were collected and dialyzed against buffer A. This material was applied to a Mono S column, and the column washed and eluted as described above. Active fractions were pooled and concentrated on an Amicon ultrafiltration cell. This pool was then applied to a Superose-12 column equilibrated with 0.1 M sodium phosphate buffer pH 6. This procedure gave a substantially pure protein with a molecular weight as determined by SDS-PAGE (Pharmacia Phast system, operated according to instructions) of approx. 40 kDa. International Application No: PCT/ MICROORGANISMS Optional Sheet In connection with the microorganism referred to on page 3 , Una 12 of the description > A. IDlNTIFICATtON OF OtPOSIT > Further depoalta ara Identified on an additional sheet pC|» Name of depositary Institution * DEUTSCHE SAMMLUNG VON MIKROORGANISMEN UND ZELL¬ KULTUREN GmbH Addreaa of depositary Institution (Including postal code and country) * Mascheroder Weg lb, D-38124 Braunschweig, Federal Re¬ public of Germany Data of depoeit * Accaaaion Number * 4 October 1993 DSM 8593 S. ADDITIONAL INDICATIONS ' (leave blank It not applicable). Thla Information la continued on a separate attached sheet Q In respect of those designations in which a European and/or Australian patent is sought , during the pendency of the patent application a sample of the deposited microorganism is only to be provided to an independent expert nominated by the person requesting the sample (Rule 28 (4 ) EPC / Regulation 3 .25 of Australia Statutory Rules 1991 No 71) . C. DISIβNATID STATIS FOH WHICH INDICATIONS AMI MAOI • (If the Indications ara not for all designated States) D. SIPARATI FURNISHINO OF INDICATIONS • (leave blank If not applicable) The indications Hated below will be submitted to the International Bureau later ' (Specify the general nature of the Indlcatlona e.g., " Acceselon Number of Deposit ") I. ra_ T lι iheet wsa received with the International application (~) The data of receipt (from the applicant) by the International Bureau >• (Authorized Officer) Form PCT/RO/1-M (January 1M1) International Application No: PCT/ MICROORGANISMS Optional Sheet In connection with the mlcroorganlam referred to on page- _, Rne. 18 . of the description < A. I0INT1F1CAT1ON OF OIFOSIT • Further deposit* are Identified on an additional sheet J • Name of depositary Institution * DEUTSCHE SAMMLUNG VON MIKROORGANISMEN UND ZELL¬ KULTUREN GmbH Address of depositary institution (Including postal code and country) * Mascheroder Weg lb, D- 38124 Braunschweig, Federal Re¬ public of Germany Date of deposit » Accession Number * 9 Fe bruary 1994 D S M 8969 ADDITIONAL INDICATIONS ' (leave blank If not applicable). This Information la continued on a teparata attached theet Q In respect of those designations in which a European and/or Australian patent is sought , during the pendency of the patent application a sample of the deposited microorganism is only to be provided to an independent expert nominated by the person requesting the sample (Rule 28 (4) EPC / Regulation 3 .25 of Australia Statutory Rules 1991 No 71) . C. DISIβNATID STATKS FOR WHICH INDICATIONS ARI MADt > (If the Indlcatlona ara not for all designated States) O. SIFΑRAT1 FURNISHINS OF INDICATIONS • (leave blank If not applicable) The indlcatlona Mated below will be submitted to the International Bureau later • (Specify the general nature of the Indlcatlona e.g., " Accession Number of Deposit ") 1. ( JJThls theet wat received with the inttrnational application w I I The date of receipt (from the applicant) by the International Bureau '• (Authorized Officer) Form PCT/RO/1J4 (January 1M1) International Application No: PCT/ MICROORGANISMS Optional Sheet In connection with the microorganism referred to on page , One. 24 . of the description < A. IDINTIFICATJO OF DIFOSIT • Further deposits are Identified on an additional sheet __\ • Name of depositary Institution * DEUTSCHE SAMMLUNG VON IKROORGANISMEN UND ZELL¬ KULTUREN GmbH Address of depositary Institution (Including postal code and country) * Mascheroder Weg lb, D-38124 Braunschweig, Federal Re¬ public of Germany Date of deposit » Accession Number * 9 February 1994 D SM 8970 B. ADDITIONAL INDICATIONS ' (leave blank If not applicable). Thla InformaHon la continued on a teperate attached theet Q In respect of those designations in which a European and/or Australian patent is sought , during the pendency of the patent application a sample of the deposited microorganism is only to be provided to an independent expert nominated by the person requesting the sample (Rule 28 (4 ) EPC / Regulation 3 .25 of Australia Statutory Rules 1991 No 71) . C. DISIβNATID STATIS FOR WHICH INDICATIONS ARI MADI > (If the Indlcatlona are not lor all designated Statee) D. SIPARATI FURNISHINS OF INDICATIONS • (leave blank if not applicable) The indlcatlona Mated below will be tub itted to the International Bureeu later ' (Specify the general nature of the Indlcatlona e.g., " Acceaalon Number of Deposit ") I. f f Thlt theet wet received with the International D The date of receipt (Irom the applicant) by tha International Bureau " (Authorized Officer) Form FCT/RO/1J4 (January 1M1) International Application No: PCT/ / MICROORGANISMS 3 30 Optional Sheet In connection with the microorganism referred to on page , One of the description » A. IOINT1F1CAT10N OF DIFOSIT • Further deposits are Identified on an additional theet [X] • Name of depositary Institution ■ > DEUTSCHE SAMMLUNG VON MIKROORGANISMEN UND ZELL¬ KULTUREN GmbH Address of depositary Institution (Including postal code and country) * Mascheroder Weg lb, D-38124 Braunschweig, Federal Re¬ public of Germany Date of deposit * Accession Number * 9 Fe bruary 1994 DSM 8967 B. ADDITIONAL INDICATIONS < (leave blank If not applicable). Thla Information la continued on a teparata attached theet Q In respect of those designations in which a European and/or Australian patent is sought , during the pendency of the patent application a sample of the deposited microorganism is only to be provided to an independent expert nominated by the person requesting the sample (Rule 28 (4 ) EPC / Regulation 3 .25 of Australia Statutory Rules 1991 No 71) . C. DISIβNATIO STATIS FOR WHICH INDICATIONS ARI MADI > (if the Indlcatlont are not for all designated Statee) D. SIPARAT1 FURNISHINβ OF INDICATIONS • (leave blank If not applicable) The indication! Mated below will be tubmltted to the International Bureau later • (Specify the general nature of the Indications e.g., " Accttalon Number of Deposit ") I. (_3>Thl» theet wtt received with the International application Q The date ol receipt (from the applicant) by the International Bureau '• (Authorized Officer) Form FCT/RO/1M (January 1M1) International Application No: PCT/ Form FCT/R0/1J4 (January ltd)

Claims: CLAIMS 1. A peroxidase preparation, characterized by being producible by cultivation of a peroxidase producing strain of the family Myxococcaceae. 2. A peroxidase preparation according to claim 1, characterized by being producible by cultivation of a peroxid¬ ase producing strain of the genus Myxococcus. 3. A peroxidase preparation according to claim 2, wherein said peroxidase producing strain belongs to Myxococcus virescens. Myxococcus fulvus or Myxococcus xanthus . 4. A peroxidase preparation according to claim 3, wherein said peroxidase-producing strain is Myxococcus vires¬ cens, DSM 8593, Myxococcus fulvus, DSM 8969, or Myxococcus xanthus, DSM 8970. 5. A peroxidase preparation according to claim 1, characterized by being producible by cultivation of a peroxi¬ dase producing strain of the genus Corallococcus. 6. A peroxidase preparation according to claim 5, wherein said peroxidase producing strain belongs to Corallococ- cus coralloides or Corallococcus exiguus. 7. A peroxidase preparation according to claim 6, wherein said peroxidase producing strain is Corallococcus coralloides, DSM 8967, or Corollococcus exiguus, DSM 8968. 8. A peroxidase preparation according to claims 1-7, in which the dye absorbance is reduced to at least half the initial value after 30 sec, at pH 10.5, in a Direct Blue 1 (DBl) bleaching assay under the following conditions: 100 μM H 2 0 2 , 25 mM Borate, 10 μM 10-propionic acid phenothiazine, 0.5 PODU/ml Myxococcaceae peroxidase preparation, room temp., and in which the initial concentration of DBl is adjusted to yield an 0D 61fJ = 0.6. 9. A process for the production of peroxidase charac¬ terized by comprising cultivation in a suitable nutrient medium 5 of a peroxidase producing strain of the family Myxococcaceae. 10. A process for the production of peroxidase characterized by comprising cultivation in a suitable nutrient medium of a peroxidase producing strain of the genus Myxococ¬ cus. 10 11. A process according to claim 10, wherein the strain belongs to Myxococcus virescens, preferably DSM 8593, Myxococcus fulvus, preferably DSM 8969, or Myxococcus xanthus, preferably DSM 8970. 12. A process for the production of peroxidase 15 according to claim 9, characterized by comprising cultivation in a suitable nutrient medium of a peroxidase producing strain of the genus Corallococcus. 13. A process according to claim 12, wherein the strain belongs to Corallococcus coralloides, preferably DSM 208967, or Corallococcus exiguus, preferably DSM 8968. 14. A process according to any of claims 9-13, wherein said cultivation is performed at a temperature in the range 20-30°C. 15. A bleaching composition comprising a peroxidase 25 according to any of claims 1-8 and hydrogen peroxide or a hydrogen peroxide precursor, e.g. perborate or percarbonate, or a hydrogen peroxide generating enzyme system, e.g. an oxidase and its substrate, or a peroxycarboxylic acid or a salt thereof. 16. A bleaching composition according to claim 15, wherein the amount of peroxidase corresponds to a concentration in the wash liquor of between 0.01 and 20 PODU/ml and the amount of hydrogen peroxide or hydrogen peroxide precursor or 5 hydrogen peroxide generating enzyme system or peroxycarboxylic acid or a salt thereof corresponds to a hydrogen peroxide concentration in the wash liquor of up to 20 mM H 2 0 2 , preferab¬ ly a hydrogen peroxide concentration of up to 1 mM H 2 0 2 . 17. A bleaching composition according to claim 15 or 1016, which additionally comprises an oxidizable substrate such as an organic compound, such as a phenolic compound, e.g. p- hydroxybenzene sulphonate or 10-propionic acid phenothiazine. 18. A bleaching composition according to claim 17, wherein the amount of oxidizable substrate corresponds to a 15 concentration in the wash liquor of between 0.1 μM and 100 μM. 19. A detergent composition comprising a surfactant, a peroxidase according to any of claims 1-8 and hydrogen peroxide or a hydrogen peroxide precursor, e.g. perborate or percarbonate, or a hydrogen peroxide generating enzyme system, 0 e.g. an oxidase and its substrate, or a peroxycarboxylic acid or a salt thereof. 20. A detergent composition according to claim 19, wherein the amount of peroxidase corresponds to a concentration in the wash liquor of between 0.01 to 20 PODU/ml and the amount 5 of hydrogen peroxide or hydrogen peroxide precursor or hydrogen peroxide generating enzyme system or peroxycarboxylic acid or a salt thereof corresponds to a hydrogen peroxide concentration in the wash liquor of up to 20 mM H 2 0 2 , preferably a hydrogen peroxide concentration of up to 1 mM H 2 0 2 . 0 21. A detergent composition according to claim 19 or 20, which additionally comprises an oxidizable substrate such as an organic compound, such as a phenolic compound, e.g. p- hydroxybenzene sulphonate or 10-propionic acid phenothiazine. 22. A detergent composition according to claim 21, wherein the amount of oxidizable substrate corresponds to a concentration in the wash liquor of between 0.1 μM and 100 μM.

Inventors: NOERREVANG IBEN, PEDERSEN ANDERS HJELHOLT, SJOEHOLM CARSTEN, NOERREVANG, IBEN, PEDERSEN, ANDERS, HJELHOLT, SJOEHOLM, CARSTEN
Applicants: NOERREVANG IBEN, NOVONORDISK AS, PEDERSEN ANDERS HJELHOLT, SJOEHOLM CARSTEN, NOERREVANG, IBEN, NOVO NORDISK A/S, PEDERSEN, ANDERS, HJELHOLT, SJOEHOLM, CARSTEN
Application year: 1994
Main classification: C12N9
IPC codes: C08H5, C11D3, C12N9, D21C5